便攜式超聲系統(tǒng)完整的信號路徑解決方案

　　醫(yī)學超聲是一種復雜的信號處理系統(tǒng)，其非侵入性使其具有廣泛的應用前景。

　　有一個不斷增長的需求，獲得的醫(yī)療服務。世界人口迅速增長和老齡化，增加醫(yī)療成本。醫(yī)生需要小，高效節(jié)能，成本有效的診斷設備。便攜式診斷設備，具有成本效益的方式，將提高醫(yī)療質(zhì)量是非?？扇〉?。

　　除了解決傳統(tǒng)成像在產(chǎn)科、婦科、放射學、心臟病學和血管應用中的應用外，便攜式超聲成像允許在護理點進行部署。系統(tǒng)設計者發(fā)現(xiàn)，簡單地將控制臺縮小到便攜式或手持設備并不能保證足夠的電池壽命或診斷圖像質(zhì)量。

　　Beamforming technique

　　Innovations in system architecture， coupled with analog and mixed signal electronics， FPGA-based algorithms and control， or CPU and GPU-based image processing enable compact systems with high diagnostic relevance. Ultrasound systems use focal imaging techniques to achieve performance far beyond what can be achieved through a single-channel approach. Using an array of transmitters and receivers， a high-definition image can be built by time shifting， scaling， coherently summing echo energy， and phasing as seen in the phased array ultrasound system in Figure 1. The concept of shifting， phasing， and scaling of transmit and receive signals， generally from the same reciprocal transducer array， is known as beamforming. It provides the ability to form an image by dynamically focusing and concentrating energy sequentially in points of the scan region.